Neonatal immunodeficiency can be caused by a variety of factors. Primary immunodeficiencies are often due to genetic mutations affecting the development or function of immune cells. Conditions such as _Severe Combined Immunodeficiency (SCID)_ and _DiGeorge Syndrome_ are examples of primary immunodeficiencies. Secondary immunodeficiencies in neonates can result from external factors such as _premature birth_, malnutrition, or exposure to certain infections and medications.
